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Finding the Fourth Proportional to 122,463.36, 169,009.20 and 68,751.90

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Solution

The fourth proportional to 122,463.36, 169,009.20 and 68,751.90 is: 94,883.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,463.36 : 169,009.20 = 68,751.90 : x
  2. Step 2: Convert to fraction form
    122,463.36/169,009.20 = 68,751.90/x
  3. Step 3: Cross multiply
    122,463.36x = 169,009.20 × 68,751.90
  4. Step 4: Simplify right side
    122,463.36x = 11,619,703,617.48
  5. Step 5: Solve for x
    x = 11,619,703,617.48/122,463.36
  6. Step 6: Final answer
    x = 94,883.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.